Question

despeje la x en la ecuación
a) 2x +3 = 13
b) 12+ + 3x = 20 -x
c) 2x -3 = 6 +x
d) 2(2x -3) = 6 +x
e) 4(x-10) = -6 (2-x) -6x
f) 20x - 30 = - 10x

Answer 1

a) x = 5

b) x = 2

c) x = 9

d) x = 4

e) x = 7

f) x = 1

Answer 2

Respuesta:

A) 2x + 3= 13

2x = 13 - 3

2x = 10

x = 10/2

x = 5

B) 12 + 3x = 20 - x

3x + x = 20 - 12

4x = 8

x = 8/4

x = 2

C) 2x - 3 = 6 + x

2x - x = 6 + 3

x = 9

D) 2(2x - 3) = 6 + x

4x - 6 = 6 + x

4x - x = 6 + 6

3x = 12

x = 12/3

x = 4

E) 4(x - 10) = -6(2 - x) -6x

4x - 40 = -12 + 6x - 6x

4x - 40 = -12

4x = -12 + 40

4x = 28

x = 28/4

x = 7

F) 20x - 30 = -10x

20x + 10x = 30

30x = 30

x = 30/30

x = 1